docstr: For tuner to issue trial config when the config is generated
          
docstr_tok: ["For","tuner","to","issue","trial","config","when","the","config","is","generated"]
code: def send_trial_callback(self, id_, params):
      """For tuner to issue trial config when the config is generated"""
      self.send(CommandType.NewTrialJob, _pack_parameter(id_, params))
  
imports: import logging
  from collections import defaultdict
  from nni import NoMoreTrialError
  from nni.assessor import AssessResult
  from .common import multi_phase_enabled
  from .env_vars import dispatcher_env_vars
  from .msg_dispatcher_base import MsgDispatcherBase
  from .tuner_command_channel import CommandType
  from ..common.serializer import dump, load
  from ..utils import MetricType
label_desc: Use image node_id 5 for calling the MsgDispatcher obj's underlying member method code with example usage: obj.send_trial_callback(id_, params) without return types